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Occlusion evaluation apparatus and occlusion evaluation method

a technology of occlusion evaluation and evaluation apparatus, which is applied in the direction of impression caps, instruments, teeth capping, etc., can solve the problems of not knowing, device or method for measuring masticatory ability, and masticatory ability cannot be evaluated, so as to improve the quality of the denture, improve the diagnostic and fabrication accuracy, and improve the masticatory ability of the molar teeth.

Active Publication Date: 2013-07-23
SHOFU INC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides an apparatus and method to evaluate the ability of teeth and dentures to chew on food. This is done by measuring the changes in the space between the teeth when chewing, without actually using the teeth. By analyzing these changes, the effectiveness of the chewing can be determined, independent of muscle power and chewing habits. This allows for quantitative assessments of the masticatory ability of dentures due to wear and grinding, which can help in designing better dentures for patients. Additionally, this technology can be used to compare the masticatory abilities of different dentures and to simulate changes in the denture due to grinding.

Problems solved by technology

However, any device or method for measuring a masticatory ability due to a condition of arrangement and occlusion of teeth is not known.
However, any device or method for measuring a masticatory ability due to a condition of arrangement and occlusion of teeth is not known.
Specifically, a comparison between different dentures or between a denture before use and the same denture after use is not made, and therefore evaluation of a time for replacement of a denture or a masticatory ability of a denture can not be made.

Method used

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  • Occlusion evaluation apparatus and occlusion evaluation method
  • Occlusion evaluation apparatus and occlusion evaluation method
  • Occlusion evaluation apparatus and occlusion evaluation method

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Embodiment Construction

[0039]Hereinafter, an embodiment of the present invention is described with referring drawings. An occlusion evaluation apparatus according to the present invention can be realized using a computer and the like that comprises an arithmetic device, a data input device, a display device and a user input device as shown in FIG. 1.

[0040]The arithmetic device can be substantialized using a personal computer and a software program, while the arithmetic device may be exclusively designed. The data input device can be not only a device such as three dimensional scanner reading directory three dimensional shape, but also a device for inputting three dimensional data which is read by an external three dimensional scanner and the like into the arithmetic device, such as a media reading device, for instance a memory device or a disc drive, or a data communication device. The display device may be a common display. As the user input device, a generalized input device such as a keyboard and a mou...

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Abstract

An occlusion evaluation apparatus capable of evaluating a masticatory ability depending on an occlusal geometry of teeth without actually used by a human subject, reads three dimensional data of geometries of maxillary molar teeth 1, 2, 3, 4 and mandibular molar teeth 5, 6, 7, 8, and specifies a geometry of a fluxion space Va defined by a plane Sa which includes two adjacent contact points Pa between the maxillary molar teeth 1, 2, 3, 4 and mandibular molar teeth 5, 6, 7, 8 and which is perpendicular to the occlusal plane, the occlusal surfaces of the maxillary molar teeth 1, 2, 3, 4, and the occlusal surfaces of the mandibular molar teeth 5, 6, 7, 8.

Description

TECHNICAL FIELD[0001]The present invention relates to an occlusion evaluation apparatus and an occlusion evaluation method.BACKGROUND ART[0002]As a method for measuring a masticatory ability of teeth (natural teeth and artificial teeth), as described in JP-2005-237710-A, JP-2008-220600-A and “Guideline for masticatory disturbance evaluation method-primarily method for measuring a masticatory ability—”, Prosthodontic Journal, 2002, vol. 46 no. 4, p. 619-625, it is introduced a method for determining a masticatory ability by means that a human actually masticate something.[0003]With such method, an effect of a muscular power, a chewing habit and the like of a human subject, and an effect of an occlusal geometry of teeth (including artificial teeth) can not be separately measured. Especially, at fabrication or adjustment of an artificial tooth, it is preferable that a masticatory ability resulted from an occlusal geometry of the artificial tooth can be independently evaluated.[0004]In ...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): G06K9/00
CPCA61C9/0053A61C19/05
Inventor KADOBAYASHI, YUSEISHIGEZAWA, MASAKOTAKAHASHI, KEIJI
Owner SHOFU INC
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